What is Hygrometer? How To Measure Humidity in the Air?

The following best describe use of Hygrometer is to measure the humidity in air. A Hygrometer is an instrument used for measuring the moisture content in the environmental air, or humidity. Humidity is difficult to measure accurately. Most measurement devices usually rely on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed.

Hygrometer Picture